Js - the difference between map() and filter()

 function isLong(city){ return city.length >8; }

const cities = ['London','Liverpool','Totnes','Edinburgh'];

const longer = cities.filter(isLong);

console.log(longer);

VM1941:1 (2) ['Liverpool', 'Edinburgh']

const test = cities.map(isLong);

console.log(test);

VM2112:1 (4) [false, true, false, true]

One way to prove the difference the answers are different for the same function. Rute Bezerra de Meneze Gondim